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Finding the Fourth Proportional to 123,462.66, 170,369.64 and 72,477.48

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Solution

The fourth proportional to 123,462.66, 170,369.64 and 72,477.48 is: 100,013.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,462.66 : 170,369.64 = 72,477.48 : x
  2. Step 2: Convert to fraction form
    123,462.66/170,369.64 = 72,477.48/x
  3. Step 3: Cross multiply
    123,462.66x = 170,369.64 × 72,477.48
  4. Step 4: Simplify right side
    123,462.66x = 12,347,962,175.71
  5. Step 5: Solve for x
    x = 12,347,962,175.71/123,462.66
  6. Step 6: Final answer
    x = 100,013.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.